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add get-some-value to seq API, expose quantifier tactics

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2016-01-26 08:05:44 -08:00
parent 345f6e87bd
commit 8e378062e2
3 changed files with 29 additions and 0 deletions
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13
src/ast/seq_decl_plugin.cpp
View file

@ -744,6 +744,19 @@ bool seq_decl_plugin::is_value(app* e) const {
m_manager->is_value(e->get_arg(0)));
}
expr* seq_decl_plugin::get_some_value(sort* s) {
seq_util util(*m_manager);
if (util.is_seq(s)) {
return util.str.mk_empty(s);
}
sort* seq;
if (util.is_re(s, seq)) {
return util.re.mk_to_re(util.str.mk_empty(seq));
}
UNREACHABLE();
return 0;
}
app* seq_util::mk_skolem(symbol const& name, unsigned n, expr* const* args, sort* range) {
SASSERT(range);
parameter param(name);

3
src/ast/seq_decl_plugin.h
View file

@ -177,10 +177,13 @@ public:
virtual bool is_unique_value(app * e) const { return is_value(e); }
virtual expr * get_some_value(sort * s);
bool is_char(ast* a) const { return a == m_char; }
app* mk_string(symbol const& s);
app* mk_string(zstring const& s);
};
class seq_util {